100723440 has 160 divisors (see below), whose sum is σ = 331693056. Its totient is φ = 25231360.

The previous prime is 100723439. The next prime is 100723451. The reversal of 100723440 is 44327001.

It is a super-2 number, since 2×100723440² = 20290422730867200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391792 + ... + 392048.

Almost surely, 2^100723440 is an apocalyptic number.

100723440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100723440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165846528).

100723440 is an abundant number, since it is smaller than the sum of its proper divisors (230969616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100723440 is a wasteful number, since it uses less digits than its factorization.

100723440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 100723440 is about 10036.1068148959. The cubic root of 100723440 is about 465.2754986692.

The spelling of 100723440 in words is "one hundred million, seven hundred twenty-three thousand, four hundred forty".